Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Pyroxene Group from
San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy


Classification
Species:'Pyroxene Group' (not an IMA approved species)
Formula:ADSi2O6
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyroxene Group data
Locality Data:Click here to view San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy
Data Identifiers
Mindat Occurrence Record ID:942011
Long-form Identifier:1:3:942011:3
GUID (UUID V4):0
Nearest other occurrences of Pyroxene Group
7.9km (4.9 miles) ⓘLa Botte (Botte), Vetralla, Viterbo Province, Lazio, Italy
9.2km (5.7 miles) ⓘCassia Road km 61.5, Capranica, Viterbo Province, Lazio, Italy
23.3km (14.5 miles) ⓘSH2 deep well, Bracciano, Metropolitan City of Rome Capital, Lazio, Italy
27.2km (16.9 miles) ⓘBorghetto, Civita Castellana, Viterbo Province, Lazio, Italy
30.6km (19.0 miles) ⓘMonte Sassetto, Allumiere, Metropolitan City of Rome Capital, Lazio, Italy
32.2km (20.0 miles) ⓘSpizzicatore Hill, Allumiere, Metropolitan City of Rome Capital, Lazio, Italy
32.7km (20.3 miles) ⓘPianciano, Castel Giuliano, Bracciano, Metropolitan City of Rome Capital, Lazio, Italy
33.7km (20.9 miles) ⓘCasale Rosati, Valentano, Viterbo Province, Lazio, Italy
35.4km (22.0 miles) ⓘMonte Cavalluccio, Campagnano di Roma, Metropolitan City of Rome Capital, Lazio, Italy
35.8km (22.2 miles) ⓘFosso Attici, Magliano Romano, Metropolitan City of Rome Capital, Lazio, Italy
References
Fantappiè L. (1897): Nuove osservazioni su minerali dei blocchi erratici della regione cimina. Riv. Miner. e Crist. Ital., 17, 3-19
Zambonini F. (1900): Anortite di S. Martino (Viterbo). Riv. Miner. e Crist. Ital., 24, 4-13
Scherillo A. (1940): I proietti con minerali boriferi dei Vulcani Cimini. Per. Mineral., 11, 367-391
Stoppani, F.S., Curti, E. (1982): I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.
 
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